Our minds must relax: they will rise better and keener after rest. Just as you must not force fertile farmland, as uninterrupted productivity will soon exhaust it, so constant effort will sap our mental vigour, while a short period of rest and relaxation will restore our powers. Unremitting effort leads to a kind of mental dullness and lethargy.
Seneca the YoungerWhatever we owe, it is our part to find where to pay it, and to do it without asking, too; for whether the creditor be good or bad, the debt is still the same.
Seneca the YoungerThe sovereign good of man is a mind that subjects all things to itself and is itself subject to nothing; such a man's pleasures are modest and reserved, and it may be a question whether he goes to heaven, or heaven comes to him; for a good man is influenced by God Himself, and has a kind of divinity within him.
Seneca the Younger